The key to the problem of rope folding in half is to understand that every folding is half of the original, so once you fold in half, multiply the length of the folded rope by 2, which is the length of the original rope, and then multiply it by 2. Fold in half twice, multiply the length of the folded rope by 2, and then multiply it by 2, which is the length of the original rope, and then multiply it by 2. Fold it in half three times, and the length of the folded rope is multiplied by 2, multiplied by 2, multiplied by 2 and multiplied by 3.